Receiver



W. KAISLING July 17, 1928.

RECEIVER Original Filed March 5, 1921 a a 4 n I \o I 0.5 52 U5 m m m m Patented July 17, 1928.

UNITEDSTATES PATENT OFFICE.

WILLIAM Insure; OFCHIGAGO, ILLINOIS, assre von. T0 KELLDGG SWITGHBOARD AND SUPPLY oommmr. or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.-

Original m i tra es 3,1 9 21, Se ria1 in 449,396. Patent No. 1,551,310, dated Ame 25, 1925.

Divided and this application filed March 14, 1925. Serial .No.15,440.

My invention relates to receivers and has to. do more particularly with the so-called watch-case receivers which are usedas head receivers for telephone switchboard oper- I ators: i

An object of myinvention is theprovision of a receiver of slmphfied construction, and in which the weight :is reduced to a mlmmum without impairing the efiiciency of the device.- This application is a division. of my application S. N. 449,396, filed March 3;, 1921 which matured into Patent No. 1,551,310, granted Ang. 25, 1925. i i

.A feature of my invention is the provision of an improved meansior securing the head band to the receiver. wherebyit is pivotally supported andheld do its supporting means without additional fastenin means such as screws.

[/llhe above feature, as well; as others, will a be more fullyhereinafter described, and for a clearer understanding of my. invention reference may be hadsto the accompanying drawing, in whlch like reference characters inthe several views denote like parts, and in which I invention invention ,Fig. l is a rear vicw of the receiver ofniy Fig.2 is a side view otthc receiver;

Fig. 3 1s a face view of the receiver of my Fig.4 is a jaceiview of; the receiver with the earpiece or capand the diaphragm removed; i

rigs-1S Fig. 6 is a sectaonahvmw ofthe receiver along a 11m; zi of r a;

7" i a S i n ie 0 of 4 to more clearly illustrate the construction of the. binding posts: and

.. Fig.8 is a perspect ve viewof thesupport member to whiclrthefhcad band is secured.

. not or hard rubber the said; casing2 being v provided with eigberior threads i at its forward end, upon which is screwed the ear 3 piece or receiver cap, 5, which is also of insulatingmaterial such as a phenolic condensation product, the said cap 5 serving to clamp the race:verdiaphragm 6 between the e y a sectionalhview of the receives along the linea -dot Fig. 3;

sa as as.

.rod 18 which. rod may be imbedded in a rib .the said cup member 7 receiving the permanent magnet M, as will now be described.

The permanent magnet M consitsof a plurality of horeshoe-shaped pieces 8 of steel or other suitable'magnetic material, each of which is permanently magnetized, said magnets being placed one upon another andbeing of such shape as to rest in the rearward- 1y extending cup me1nber7 and fit along the inner periphery of the said cup member 7, Witlrtheir ends 9 terminating over the portions 10' of the pole pieces11,,as clearly illustrated in Fig. 5. The pole pieces 11 are bent, the portions 10 passing beneath the ends 9 of the permanent magnet M, and the portions 11 extending; upwardly. in proximity to the receiverfdiaphragm 6 andcarry the magnet coils 12. The permanent magnet relation With the cup-shaped member 7 as to bring the pole pieces ll in the center of the diaphragm. The p olepieces 11 and magnet M are secured against movement in the cupshaped member 7by means of the screws 13,

which pass throughsuitable openings 15 in the ends 9 of the magnet M and openings 16 in the bottom offthe cup-shaped memher 7. and have screw-threaded engagement with suitable tapped orifices 17 in the metal on the bottom outer "face of the cup member 7 of the receiver during the mouldlng operation of thesame. The rod 18 alsoserves as securing means or supporting means for magnet M which rests in the eccentrically disposed cup is so constructed as to brin the poles of the magnets in the center with relation to the diaphragm 'lh'istyj ie of coi'istruction permits the use ofa much smaller magnet and reduces the weight considerablv, but does not impair the efii'-" eieney ofthe receiver.

In order to. connect the magnet coils .12

in the electrical circuit in which the instrument is to be used, suitable binding posts Bare provided. A separate terminal block 20 is provided-and of suitable insulating materiah and theterniinal studs 21 are provided and are suitably imbedded in the terminal block 20 during the moulding operation of thesame. T he studs 21 are provided with reduced portions 22, which are threaded and extend through suitable orifices 23 in the bot-tom of the casing 2 when the said ter'minal block 20 is in place upon said casing'2. Terminal clips 21 are provided with central orifices of a size to permit them to he slipped over thejthremicd portions 22 of the studs 21 whicli protrude through the openings 23 in the casing 2. Lock nuts 26 are provided, which Iock. nuts haveserewthreaded engagemeiit with the threaded portions 22 ohthestuds2l and clamp the ferminal'elips 24 between said nuts 26 and the easing 2'. The terminal clips 24. are provided withterminal ends (Fig.4) to which the terminal'sof theeoils 12 are soldered. \Vhen the lock nuts 26 arfetightened upon the threaded portions 22 of the studs 21 the said nuts 26 also secure theter ninal hlock2t) to the bottom face of the easingf2. The portion of orifices 27, and the terminal block 20 is also provided with openings28 which are in alignment witlrsaid openings 27, and said openings 27 and 28' receive the metalti ps 29' of the receiver cord, thus connecting coils 12 withthe electric circnit in which the receiver isto housed, and to secure the metal tips 29 in orifices 27, clamping screws 30 are provided, engaging the centrally tapped orifices 3 1 iii the stud 21. The said screws 30 when tightenedclhmp the metal tips 29 in'the said openings 27. against displacement. The terminal bloekQO is provided' with an orifice 32through which the strain cord 33 of the receiver cord is inserted and tied so as to relieve thest'rain' from the cord terminals 29. v

The receiver head hand'support. comprises a U-shaped member 34 of suitable spring 'the st ud s 21xvhicliare imbedded in the terminal blb'ck 20 are provided with transverse metal upon \yhichfthe headband H ofs'pring Wire is pivotally secured by means of the clip 38 provided with a air of integrally formed extensions 39,. wiich are suitably formed over the ends 37 of the wire head hand The member 38, whiclrsupp'oifts the head band 'H, is pivotatlly secured by means of thepivot-rivet 41 upon the U- :shaped member 34 to permit adjustment of the head band H when placed in position upon the head of the operator. To support .U-sha'ped member 34" are forced apart and released so as to sliporificcs 43 over the pins 42. When in this position the. legs of the member 84 are under spring tension and hold said member 34 and head hand lil in pivotal position upon the pins 41 and the pivotal support of the head bandI'I by means oft he pivot 41; and the pivotal sup ports of the U-shapcd member 34 upon the pins 42 permits aready adjustment of the receiver so'that it can always rest in a correct and easy position against the operators ear. I

Having described aspecific form of my invention, I do not wish, however. to he limitedto the exact structure as illustrated and described, but aim to cover all changes and modifications asWill readily suggest themselves in the appended claims. i i

What I claim as new and desire to secure by United States Letters Patent, is:

p 1. In a receiver of the character described including a casing, a permanent magnet, a pivot member secured to said casing, means for securing said permanent magnet to said pivot member, a head band, a clip member having integrally formed extensions adapted to encompass the ends of said head band, and a U-shaped spring member pivotally secured to said clip member for engaging said vpivot member to pivotally secure said head band by means of saitl" clip on said casing. 2. In a receiver of the"characterdescribed including a casing, a head band, a U -shap'ed member pivotally secured to said head hand i by means of a clip havingintegrally formed extensions adapted to encompass the ends of said headband, and a. member having reduced endport ons secured to said casing,

a permanent magi'iet in said casing secured to said member. having reducedeuds, said U -Shaped member pirotallyj supported by saidlast member whereby said head band is supported on said casing.

31 In a receiver of the character descrihed' inelhding a' casing, a perinalnentmagnet, a rod member, m'e'ans fer'secarim said permanent ma net to said rod mem er and other means including a portion ofsaid casing for securing said rod member to said casing, a

head hand, and means including a clip memher hav ng integrally formed extensions for pivotally supporting and securing said head band onsaid rod member;

4. In a receiver of the character described including an enclosing case, a member having reduced end portions secured to the back of said enclosing case, a permanent magnet in said casing secured to said member, a head band, a U-shaped member having its legs engaging the reduced end portions of said member whereby said U-shaped member is pivotally supported on said member, said head band being pivotally secured to and in termediate the legs of said U-shaped member by means including a clip having integrally formed extensions adapted to encompass the ends of said head band.

5. In a receiver of the character described including an enclosing case, a member having reduced end portions secured to one side a of said enclosing case, a permanent magnet in said casing secured to said member having reduced end portions intermediate of said reduced end portions, a spring member engaging said reduced end portion and pivotally supported thereon, a head band, and a member having integrally formed extensions adapted to encompass the ends of said head band for pivotally securing said head band to said spring member.

6. In a receiver of the character described including an enclosing case, a member having reduced end portions secured to said enclosing case, a permanent magnet in said casing secured to said member having re duced end portions, a spring member span ning the intermediate portion of said member and engaging said reduced end portions of said member, a head band, and means including a clip having integrally formed extensions adapted to encompass the ends of said head band for pivotally supporting said head band on said spring member.

7. In a receiver of the character described including an enclosing case, a rod member having reduced end portions secured on said casing, a head band, a permanent magnet in said casing, means for securing said magnet to said rod member, a spring member pivotally supported on the reduced end portions of the member secured on said case, means including integrally formed extensions adapted to encompass the ends of said head band for pivotally supporting said head band on said spring member, said means and said spring member adapted to permit adjustment of said head band relative to said receiver.

Signed by me at Chicago, in the county of Cook and State of Illinois, this 12th day of March, 1925.

WILLIAM KAISLING. 

